1997

7.1

1987

8.1

1951

7.4

1998

8.2

1998

5.6

1986

6.6

2015

6.3

1967

6.5

2006

8.1

2016

4.3

2000

9.0

2002

7.2

1994

8.5

1997

7.6

2008

6.2

2016

0.0

1966

6.7

2020

0.0

1979

8.3

2024

6.1